Add schedule (#23721)

Co-authored-by: Zack Barett <zackbarett@hey.com>

source/_integrations/schedule.markdown

@@ -0,0 +1,110 @@
+---
+title: Schedule
+description: Instructions on how use make weekly schedule in Home Assistant.
+ha_category:
+  - Automation
+  - Helper
+ha_release: 2022.9
+ha_quality_scale: internal
+ha_codeowners:
+  - '@home-assistant/core'
+ha_domain: schedule
+ha_integration_type: helper
+---
+
+The schedule integration provides a way to create a weekly schedule in
+Home Assistant that can be used to trigger or make decisions in your
+automations and scripts.
+
+The preferred way to configure a schedule is via the user interface at
+**Settings** -> **Devices & Services** -> **Helpers**. Click the add button
+and then choose the **Schedule** option, or click the My button below.
+
+{% include integrations/config_flow.md %}
+
+To be able to add **Helpers** via the user interface you should
+have `default_config:` in your `configuration.yaml`, it should already
+be there by default unless you removed it.
+
+If you removed `default_config:` from your configuration,
+you must add it back or, alternatively, `schedule:` to your
+`configuration.yaml` first, before you can create them via the UI.
+
+Alternatively, a schedule can also be created and configured via YAML
+configuration. For example:
+
+```yaml
+# Example configuration.yaml entry
+schedule:
+  thermostat_schedule:
+    name: "Thermostat schedule"
+    monday:
+      - from: "17:00:00"
+        to: "21:00:00"
+    tuesday:
+      - from: "17:00:00"
+        to: "21:00:00"
+    wednesday:
+      - from: "17:00:00"
+        to: "21:00:00"
+    thursday:
+      - from: "17:00:00"
+        to: "21:00:00"
+    friday:
+      - from: "17:00:00"
+        to: "23:00:00"
+    saturday:
+      - from: "07:00:00"
+        to: "10:00:00"
+      - from: "16:00:00"
+        to: "23:00:00"
+    sunday:
+      - from: "07:00:00"
+        to: "21:00:00"
+```
+
+{% configuration %}
+schedule:
+  description: Alias for the schedule. Multiple entries are allowed.
+  required: true
+  type: map
+  keys:
+    name:
+      description: Friendly name of the schedule.
+      required: true
+      type: string
+    icon:
+      description: Icon to display in the frontend for this schedule.
+      required: false
+      type: icon
+    "monday|tuesday|wednesday|thursday|friday|saturday|sunday":
+      description: A schedule for each day of the week.
+      required: false
+      required: true
+      type: list
+      keys:
+        from:
+          description: The start time to mark the schedule as active/on.
+          required: true
+          type: time
+        to:
+          description: The end time to mark as inactive/off again.
+          required: true
+          type: time
+{% endconfiguration %}
+
+### Attributes
+
+A schedule entity's state exports attributes that can be useful in
+automations and templates.
+
+| Attribute | Description |
+| ----- | ----- |
+| `next_event` | A datetime object containing the next time the schedule is going to change state. |
+### Services
+
+Available service: `schedule.reload`.
+
+#### schedule.reload
+
+`schedule.reload` service allows one to reload the schedule's configuration without restarting Home Assistant itself.